Two U.S. satellites designed to study the radiation belts hovering above the Earth's atmosphere were successfully launched into orbit on Thursday. The twins began a two-year, $686-million mission when they blasted off before dawn aboard an unmanned rocket at the U.S. spaceport Cape Canaveral, Florida. The probes will determine how the identical belts, composed of electrically charged particles from the sun and deep space, are affected by energy disturbances that cause them to ...
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